FprEN 12899-6
(Main)Fixed, vertical road traffic signs - Part 6: Performance of retroreflective sign face materials
Fixed, vertical road traffic signs - Part 6: Performance of retroreflective sign face materials
This Part 6 of EN 12899 describes the performance requirements for retroreflective sign face materials.
Ortsfeste, vertikale Straßenverkehrszeichen - Teil 6: Leistungsverhalten retroreflektierender Signalbildmaterialien
Signaux fixes de signalisation routière verticale - Partie 6 : Performances des matériaux rétroréfléchissants constituant des faces de panneaux
La présente Partie 6 de l'EN 12899 décrit les exigences de performances relatives aux matériaux rétroréfléchissants des faces de panneaux.
Stalna vertikalna cestna signalizacija - 6. del: Lastnosti materialov za retroreflektivne znake
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Stalna vertikalna cestna signalizacija - 6. del: Lastnosti materialov za retroreflektivne znakeOrtsfeste, vertikale Straßenverkehrzeichen - Teil 6: Lichttechnische Mindestanforderungen an Reflexstoffe mikroprismatischer MaterialienSignaux fixes de signalisation routière verticale - Partie 6 : Performances des matériaux rétroréfléchissants constituant des faces de panneauxFixed, vertical road traffic signs - Part 6: Performance of retroreflective sign face materials93.080.30Cestna oprema in pomožne napraveRoad equipment and installationsICS:Ta slovenski standard je istoveten z:FprEN 12899-6kSIST FprEN 12899-6:2013en,fr,de01-februar-2013kSIST FprEN 12899-6:2013SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
FINAL DRAFT
September 2012 ICS 93.080.30 English Version
Fixed, vertical road traffic signs - Part 6: Performance of retroreflective sign face materials
Signaux fixes de signalisation routière verticale - Partie 6 : Performances des matériaux rétroréfléchissants constituant des faces de panneaux
This draft European Standard is submitted to CEN members for unique acceptance procedure. It has been drawn up by the Technical Committee CEN/TC 226.
If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to provide supporting documentation.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
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B-1000 Brussels © 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. FprEN 12899-6:2012: EkSIST FprEN 12899-6:2013
Methods for deriving the coefficient of retroreflection RA and its symmetries . 20A.1 General . 20A.2 Method for deriving RA,C(αααα,ββββ) values by thorough testing . 21A.3 Method of deriving RA,C(αααα,ββββ) values by simplified testing . 24A.4 Establishment of mounting axis reversal symmetry . 25A.5 Establishment of mounting axis rotation symmetry . 25A.5.1 General . 25A.5.2 Optical elements with complete rotational symmetry . 25A.5.3 Optical elements without complete rotational symmetry . 26Annex B (normative)
Colorimetric testing . 27B.1 Luminance factor and chromaticity of non-fluorescent materials . 27B.1.1 General . 27B.1.2 Reference method for microprismatic sign face materials . 27B.1.3 Secondary method for microprismatic sign face materials . 28B.2 Luminance factor and chromaticity of fluorescent materials . 28Annex C (informative)
Guidelines for the selection of application and retroreflection performance classes . 29C.1 Introduction . 29C.2 Application classes . 29C.3 Retroreflection performance classes . 30C.4 Vehicles other than the passenger car . 30C.5 Signs at other locations . 32C.6 Other factors . 33C.7 Guidelines . 34Bibliography . 37 kSIST FprEN 12899-6:2013
A legend or a symbol on a sign face is presented in one colour against the background of another colour. Bright colours serve generally as signal colours, while dark colours generally serve as contrast colours. A few colours may sometimes serve as signal colours and at other times as contrast colours. The signal colour is considered to be the more important in terms of retroreflective performance. The situations in which road traffic signs are used are grouped into a number of application classes, and individual signs can be specified using the range of retroreflection performance classes provided. The system of classes is complex - and has to be complex - in order to make good use of retroreflection. A single material cannot supply optimum or even adequate sign legibility in all applications, but some materials can do so in some applications and other materials in other applications. Test methods for retroreflection are provided in Annex A and for luminance factor and chromaticity in Annex B. Both annexes are of a complex technical nature, as they deal with retroreflective sign face materials of both known technologies - glass beaded and microprismatic - and because the fluorescence of fluorescent sign face materials has been taken into account. These normative annexes are primarily intended to be studied by experts working at test laboratories. It is a particular feature of retroreflection that it has limitations. Consequently, application and retroreflection performance classes cannot in practice be selected independently of each other. Some guidelines for the selection of application and retroreflection performance classes are offered in the informative annex. These are intended as the basis for forming national policies for retroreflective road traffic signs, in which various interests are weighed against each other in a suitable manner. 1 Scope This Part 6 of EN 12899 describes the performance requirements for retroreflective sign face materials. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN ISO 877-2:2010, Plastics - Methods of exposure to solar radiation — Part 2: Direct weathering and exposure behind window glass (ISO 877-2:2009) EN ISO 4892-1, Plastics — Methods of exposure to laboratory light sources — Part 1: General guidance
(ISO 4892-1) EN ISO 4892-2, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps
(ISO 4892-2) ISO 11664-2, Colorimetry — Part 2: CIE standard illuminants IEC 60050-845:1987, International Electrotechnical Vocabulary (IEV) — Chapter 845: Lighting NOTE CIE Publication 17.4 International Electrotechnical Vocabulary is identical to IEC 60050-845:1987. kSIST FprEN 12899-6:2013
CIE 54.2:2001, Retroreflection: definition and measurement
3 Terms, definitions, symbols and abbreviations
For the purposes of this document, the following terms and definitions given in IEC 60050-845:1987 and
CIE 54.2:2001 and the following apply. 3.1 signal colour the brightest colour of the sign face of a retroreflective sign NOTE The signal colour is white for most signs, but may be yellow, orange, fluorescent yellow, fluorescent yellow/green or fluorescent orange. 3.2 contrast colour any colour of the sign face of a retroreflective sign (including non-retroreflective black) that is not the signal colour 3.3 coefficient of retroreflection (of a plane retroreflecting surface), symbol RA
ratio of the luminous intensity of a plane retroreflecting surface in the direction of observation to the illuminance at the retroreflecting surface measured on a plane perpendicular to the direction of the incident light in proportion to the area of the retroreflecting surface NOTE The value of the coefficient of retroreflection depends in principle on four angles, this being the number of angles needed to describe the directions of observation and incident light relative to the retroreflecting surface. Refer to CIE 54.2 for the definition of such angles and their combination into angular systems. RA is expressed in cd.lx-1m-2 units.
3.4 RA,C(αααα,ββββ) value a calculated value of the coefficient of retroreflection RA for a combination of the observation angle . and the entran
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